#include <iostream>
#include <cstring>
#include <queue>
#include <string>
#include <algorithm>
#include <string.h>
#include <map>
#include <set>

using namespace std;
int n;

int main()
{
    cin >> n;

    int cnt = 0;
    for (int i = 1; i <= 50; i++)
    {
        string temp = to_string(i) + ".mp4";
        cout << temp << endl;
    }

    return 0;
}